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LifeFlow: Visualizing an overview of event sequences (video preview)

LifeFlow: Visualizing an overview of event sequences (video ...

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作者： Wongsuphasawat, Krist Wang, Taowei David Gómez, John Alexis Guerra Taieb-Maimon, Meirav Plaisant, Catherine Ben, Shneiderman Human-Computer Interaction Lab. Dept. of Computer Science University of Maryland College Park MD 20742 United States Human-Computer Interaction Lab. University of Maryland College Park MD 20742 United States Ben-Gurion University of the Negev Beer-Sheva Israel

ISBN: (纸本)9781450302289

Event sequence analysis is an important task in many domains: medical researchers may study the patterns of transfers within the hospital for quality control;transportation experts may study accident response logs to identify best practices. In many cases they deal with thousands of records. While previous research has focused on searching and browsing, overview tasks are often overlooked. We introduce a novel interactive visual overview of event sequences called LifeFlow. LifeFlow is scalable, can summarize all possible sequences, and represents the temporal spacing of the events within sequences. In this video, we show an example of patient transfer data and briefly demonstrate how to analyze them with LifeFlow. Please see [11] or visit http://***/hcil/lifeflowformoredetail.

关键词： Visualization

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NADA: A robust system for non-referential pronoun detection

引用

8th Discourse Anaphora and Anaphor Resolution Colloquium, DAARC 2011

作者： Bergsma, Shane Yarowsky, David Dept. of Computer Science Human Language Technology Center of Excellence Johns Hopkins University United States

ISBN: (纸本)9783642259166

We present: the Non-Anaphoric Detection Algorithm. is a novel, publicly-available program that accurately distinguishes between the referential and non-referential pronoun it in raw English text. Like recent state-of-the-art approaches, uses very large-scale web features, but makes these features practical by compressing the counts so they can fit into computer memory. therefore operates as a fast, stand-alone system. also improves over previous web-scale systems by considering the entire sentence, rather than narrow context windows, via long-distance lexical features. very substantially outperforms other state-of-the-art systems in non-referential detection accuracy. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： computers

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Visual separation in mobile multi-display environments 11

Visual separation in mobile multi-display environments

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24th Annual ACM Symposium on User Interface Software and Technology, UIST'11

作者： Cauchard, Jessica R. Löchtefeld, Markus Irani, Pourang Schoening, Johannes Krüger, Antonio Fraser, Mike Subramanian, Sriram University of Bristol Bristol Interaction and Graphics Dept. of Computer Science Woodland Rd Bristol BS8 1UB United Kingdom Stuhlsatzenhausweg 3 66123 Saarbrücken Germany University of Manitoba Computer Science Department Human-Computer Interaction Lab. Winnipeg Manitoba Canada

ISBN: (纸本)9781450307161

Projector phones, handheld game consoles and many other mobile devices increasingly include more than one display, and therefore present a new breed of mobile Multi-Display Environments (MDEs) to users. Existing studies illustrate the effects of visual separation between displays in MDEs and suggest interaction techniques that mitigate these effects. Currently, mobile devices with heterogeneous displays such as projector phones are often designed without reference to visual separation issues;therefore it is critical to establish whether concerns and opportunities raised in the existing MDE literature apply to the emerging category of Mobile MDEs (MMDEs). This paper investigates the effects of visual separation in the context of MMDEs and contrasts these with fixed MDE results, and explores design factors for Mobile MDEs. Our study uses a novel eye-tracking methodology for measuring switches in visual context between displays and identifies that MMDEs offer increased design flexibility over traditional MDEs in terms of visual separation. We discuss these results and identify several design implications. © 2011 ACM.

关键词： Separation

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Reestimation of reified rules in semiring parsing and biparsing 5

Reestimation of reified rules in semiring parsing and bipars...

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5th Workshop on Syntax, Semantics and Structure in Statistical Translation, SSST 2011 at the Annual Meeting of the Association for Computational Linguistics: human Language Technologies, ACL HLT 2011

作者： Saers, Markus Wu, Dekai Human Language Technology Center Dept. of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong

ISBN: (纸本)9781932432992

We show that reifying the rules from hyperedge weights to first-class graph nodes automatically gives us rule expectations in any kind of grammar expressible as a deductive system, without any explicit algorithm for calculating rule expectations (such as the inside-outside algorithm). This gives us expectation maximization training for any grammar class with a parsing algorithm that can be stated as a deductive system, for free. Having such a framework in place accelerates turnover time for experimenting with new grammar classes and parsing algorithms—to implement a grammar learner, only the parse forest construction has to be implemented. © 2011 Association for Computational Linguistics

关键词： Maximum principle

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Structured vs. Flat semantic role representations for machine translation evaluation 5

Structured vs. Flat semantic role representations for machin...

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5th Workshop on Syntax, Semantics and Structure in Statistical Translation, SSST 2011 at the Annual Meeting of the Association for Computational Linguistics: human Language Technologies, ACL HLT 2011

作者： Lo, Chi-Kiu Wu, Dekai HKUST Human Language Technology Center Dept. of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong

ISBN: (纸本)9781932432992

We argue that failing to capture the degree of contribution of each semantic frame in a sentence explains puzzling results in recent work on the MEANT family of semantic MT evaluation metrics, which have disturbingly indicated that dissociating semantic roles and fillers from their predicates actually improves correlation with human adequacy judgments even though, intuitively, properly segregating event frames should more accurately reflect the preservation of meaning. Our analysis finds that both properly structured and flattened representations fail to adequately account for the contribution of each semantic frame to the overall sentence. We then show that the correlation of HMEANT, the human variant of MEANT, can be greatly improved by introducing a simple length-based weighting scheme that approximates the degree of contribution of each semantic frame to the overall sentence. The new results also show that, without flattening the structure of semantic frames, weighting the degree of each frame’s contribution gives HMEANT higher correlations than the previously best-performing flattened model, as well as HTER. © 2011 Association for Computational Linguistics

关键词： Semantics

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Don't drop it! Pick it up and storyboard 11

Don't drop it! Pick it up and storyboard

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Proceedings of the SIGCHI Conference on human Factors in Computing Systems

作者： Wahid, Shahtab McCrickard, D. Scott DeGol, Joseph Elias, Nina Harrison, Steve Center for Human-Computer Interaction Virginia Tech. Blacksburg VA United States Dept. of Computer Science and Engineering Pennsylvania State University University Park PA United States Dept. of Writing Rhetoric and American Culture Michigan State University East Lansing MI United States

ISBN: (纸本)9781450302289

Storyboards offer designers a way to illustrate a narrative. Their creation can be enabled by tools supporting sketching or widget collections. As designers often incorporate previous ideas, we contribute the notion of blending the reappropriation of artifacts and their design tradeoffs with storyboarding. We present PIC-UP, a storyboarding tool supporting reappropriation, and report on two studies - a long-term investigation with novices and interviews with experts. We discuss how it may support design thinking, tailor to different expertise levels, facilitate reappropriation during storyboarding, and assist with communication. Copyright 2011 ACM.

关键词： Blending

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Principled induction of phrasal bilexica

Principled induction of phrasal bilexica

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15th International Conference of the European Association for Machine Translation, EAMT 2011

作者： Saers, Markus Wu, Dekai Human Language Technology Center Dept. of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong Hong Kong

ISBN: (纸本)9789081486118

We aim to replace the long and complicated, pipeline employed to produce probabilistic phrasal bilexica with a theoretically principled, grammar based, approach. To this end, we introduce a learning regime to learn a phrasal grammar equivalent to linear transduction grammars. The stochastic version of this new grammar type also has the property that the set of biterminals constitute a natural probability distribution, making it similar to a probabilistic translation lexicon. Since we learn a phrasal grammar, we are, in effect, learning a probabilistic phrasal bilexicon. As a proof of concept, we show that phrasal bilexica, induced in this manner, can be used to improve the performance of a traditional phrase-based SMT system. © 2011 European Association for Machine Translation.

关键词： Probability distributions

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Validated extraction of gait events from 3D accelerometer recordings

Validated extraction of gait events from 3D accelerometer re...

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International Conference on 3D Imaging (IC3D)

作者： Mohamed Boutaayamou Cédric Schwartz Julien Stamatakis Vincent Denoël Didier Maquet Bénédicte Forthomme Jean-Louis Croisier Benoît Macq Jacques G. Verly Gaëtan Garraux Olivier Brüls Laboratory of Human Motion Analysis University of Liège (ULg) Liège Belgium Electronics and Applied Mathematics Universite Catholique de Louvain Louvain-La-Neuve Belgium Department of Motricity Sciences ULg Liège Belgium Dept. of Electrical Engineering and Computer Science INTELSIG Laboratory Liège Belgium Movere Group Cyclotron Research Center Liège Belgium

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless accelerometers and a signal processing algorithm. This system automatically extracts relevant gait events such as the heel strikes (HS) and the toe-offs (TO), which characterize the stance and the swing phases of walking. The performances of the low-cost accelerometer hardware and related algorithm have been compared to those obtained by a kinematic 3D analysis system and a force plate, used as gold standard methods. The HS and TO times obtained from the gait data of 7 healthy volunteers (147 trials) have been found to be (mean ± standard deviation) 0.42±7.92 ms and 3.11±10.08 ms later than those determined by the force plate, respectively. The experimental results demonstrate that the new hardware and associated algorithm constitute an effective low-cost gait analysis system, which could thus be used for the assessment of mobility in routine clinical practice.

关键词： Accelerometers Force Acceleration Three-dimensional displays Hardware Standards Algorithm design and analysis

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Music genre/mood classification using a feature-based modulation spectrum

Music genre/mood classification using a feature-based modula...

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2011 International Conference on Mobile IT-Convergence, ICMIC 2011

作者： Lim, Shin-Cheol Jang, Sei-Jin Lee, Soek-Pil Kim, Moo Young Human Computer Interaction Lab. Dept. Information Communication Engineering Sejong University Seoul Korea Republic of Digital Media Research Center Korea Electronics Technology Institute Seoul Korea Republic of

ISBN: (纸本)9788988678602

The feature-based modulation flatness measure (FMSFM) and feature-based modulation crest measure (FMSCM) are proposed as novel feature vectors for music genre and mood classification. These features are extracted using a feature-based modulation spectrum to represent time-varying characteristics of the music signal. Instead of the spectrogram of the signal, timbral features such as mel-frequency cepstral coefficient (MFCC), decorrelated filter bank (DFB), and octave-based spectral contrast (OSC) are used for modulation. Combining FMSFM and FMSCM with the timbral features, we obtain significantly better accuracy in genre and mood classification than the conventional features. © 2011 AICIT.

关键词： Modulation

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EventGraphs: Charting collections of conference connections

EventGraphs: Charting collections of conference connections

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Hawaii International Conference on System sciences

作者： Hansen, Derek Smith, Marc A. Shneiderman, Ben University of Maryland College of Information Studies Center for the Advanced Study of Communities and Information College Park MD United States Connected Action Consulting Group Silicon Valley CA United States University of Maryland Dept. of Computer Science Human-Computer Interaction Lab. College Park MD United States

ISBN: (纸本)9780769542829

EventGraphs are social media network diagrams of conversations related to events, such as conferences. Many conferences now communicate a common "hashtag" or keyword to identify messages related to the event. EventGraphs help make sense of the collections of connections that form when people follow, reply or mention one another and a keyword. This paper defines EventGraphs, characterizes different types, and shows how the social media network analysis add-in NodeXL supports their creation and analysis. The structural patterns to look for in EventGraphs are highlighted and design ideas for their improvement are discussed. © 2011 IEEE.

关键词： Social networking (online)

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